Development of Gamma-Ray Position-Sensitive Transition-Edge-Sensor Microcalorimeters

Naoko Iyomoto, Shinya Asagawa, Tetsuya Tsuruta, Yoshiki Nishida, Yukino Hamamura, Yuta Kurume, Keisuke Maehata, Tasuku Hayashi, Kazuhisa Mitsuda

研究成果: ジャーナルへの寄稿学術誌査読


Position-sensitive transition-edge sensor (TES) microcalorimeters (PoSTs) were developed to detect gamma rays up to a few MeV. Each gamma-ray PoST comprised a 0.5 mm × 0.5 mm × 19 mm lead absorber with a TES on each end and worked as a 1D imaging spectrometer. Only one TES worked at low temperature and its results are reported herein. We irradiated the PoST device with gamma rays from a Cs-137 source, and the resultant pulses showed strong correlations between the pulse height and the rise time. To determine effective pixels, we separately divided the photopeak and lead-K escape peak pulses into 19 groups after sorting them by their rise times. From the pulse shape distributions, we concluded that the TES was sensitive to the gamma-ray interaction position as long as it was not located too far away from the TES, and that it was probably possible to determine the interaction positions of the entire absorber, if both TESs were working. The PoST device was then modeled and the average pulses of the 19 effective pixels were compared to those of numerical simulations, where the rise time distributions of the actual pulses and simulated pulses were in good agreement.

ジャーナルIEEE Transactions on Applied Superconductivity
出版ステータス出版済み - 8月 2021

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学


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